Mediocre minds thinking alike, I have already tried aumixer from debian repos in the meantime following that method, and several other GUI or curses mixers which I found there supposed to work with OSS as well.It appears that they all default to use /dev/mixer which seems not to work, and I am clueless what device to specify.

The only exception is ossxmix, where the debian version worked out of the box, no noticable difference to ossxmix.tcz

Also notable that mp3blaster works perfectly well with OSS, but unlike with alsa the builtin mixer does not work, this on same box.

Besides from ossxmix, the only app I have so far found to work for adjustment of sound with OSS is flit, which of course is limited to output volume and muting, still comes very handy though.

ossxmix would work with specifying either of them, or with not specifying any at all.

Another thing is that in xtensoftphone audiowizard where there is a dropdown menu of devices to choose, "0: High Definition Audio ALC888" turns up, besides from several "/dev/*" and playback works fine, but I can't get capture (for mic) to work.

With pjsua.tcz - which uses portaudio to be compatible with either alsa or OSS - I couldn't find any --playback-dev= or --capture-dev= to work... which is a reason I wanted a mixer in the first place, but ossxmix is way bigger than my screen and really difficult to handle, practically.

Yes, ossmix was the first thing I had looked at, but I decided I need something somewhat more graphical, and be it even something curser based, in approximate analogy to amixer vs. alsamixer. Actually if I need one graphical app for everything sound related only, that would always have been a mixer.

With pjsua.tcz - which uses portaudio to be compatible with either alsa or OSS - I couldn't find any --playback-dev= or --capture-dev= to work... which is a reason I wanted a mixer in the first place, but ossxmix is way bigger than my screen and really difficult to handle, practically.

After all it turned out that was a matter of setting '--clock-rate' value to be compatible with respective OSS devices. Works fine after that